<?php

/**
 * LoginForm class.
 * LoginForm is the data structure for keeping
 * user login form data. It is used by the 'login' action of 'SiteController'.
 */
class LoginForm extends CFormModel
{
	public $username;
	public $password;
	public $rememberMe;
	public $captcha;

	private $_identity;

	/**
	 * Declares the validation rules.
	 * The rules state that username and password are required,
	 * and password needs to be authenticated.
	 */
	public function rules(){
		return array(
			// username and password are required
			array('username, password', 'required'),
			// rememberMe needs to be a boolean
			array('rememberMe', 'boolean'),
			// password needs to be authenticated
			array('password', 'authenticate'),
			array('captcha', 'captcha'),
		);
	}

	/**
	 * Declares attribute labels.
	 */
	public function attributeLabels(){
		return array(
			'username'		=> '用户名',
			'password'		=> '密码',
			'rememberMe' 	=> '自动登录',
		);
	}

	/**
	 * Authenticates the password.
	 * This is the 'authenticate' validator as declared in rules().
	 */
	public function authenticate($attribute, $params){
		if(!$this->hasErrors()){
			$this->_identity=new UserIdentity($this->username, $this->password);
			if(!$this->_identity->authenticate())
				$this->addError('password', '用户名或密码错误！');
		}
	}

	/**
	 * Logs in the user using the given username and password in the model.
	 * @return boolean whether login is successful
	 */
	public function login(){
		if($this->_identity === null){
			$this->_identity = new UserIdentity($this->username, $this->password);
			$this->_identity->authenticate();
		}
		
		if($this->_identity->errorCode === UserIdentity::ERROR_NONE){
			$duration = $this->rememberMe ? 3600*24*30 : 0; // 30 days
			Yii::app()->user->login($this->_identity, $duration);
			return true;
		}else{
			return false;
		}
	}
}
